NASA's Wide-field Infrared Survey Explorer (WISE) launched in December,
2009 and imaged the entire sky at four infrared wavelengths. The
telescope has returned millions of images of everything from the closest
asteroids to the most distant galaxies following its year-long operational
period. While the WISE filter set was optimized to detect ultra-cool
brown dwarfs and ultra-luminous infrared galaxies, the mission has
produced infrared measurements of more than 150,000 asteroids. An
overview of the mission's history, design, and initial results will be
presented.